Screening of salt tolerance traits and the salt tolerance evaluation method in Brassica napus at the seed germination stage
Bakirov A. Zhang Y. Zhang Q. Seitahmetovna S.A. Yu X. Shi Y. Xu Y. Wang K. Qin M. Xu A. Huang Z.
29 June 2022Page Press Publications
Italian Journal of Agronomy
2022#17Issue 2
Soil salinity is one of the major abiotic stresses that negatively affect plant growth and agricultural productivity. For many crop species, the germination stage is one of the most sensitive stages to salinity stress. This study evaluated salt tolerance in 200 Brassica napus L. germplasms using hierarchical cluster analysis based on multiple morphological parameters, including germination rate, root length, fresh weight of root, shoot length, fresh weight of shoot, and total fresh weight. Membership function was used as a comprehensive index to select and evaluate salt tolerance of these germplasms, identifying 8 highly salt-tolerant germ-plasms, 40 salt-tolerant germplasms, 65 moderate salt-tolerant germplasms, 52 salt-sensitive germplasms, and 35 highly salt-sensitive germplasms lines. The responses of rapeseed germplasm to salt stress indicate differences in morphological parameters. Furthermore, NaCl showed a positive effect on total fresh weight and biomass production of some germplasms at a con-centration of 100 mmol L–1. Since the correlation value of salt tolerance with total fresh weight was highest under 200 mmol L–1 NaCl, it can be considered the most reliable parameter to evaluate salt tolerance. Therefore, the findings of this study can be applied as an effective and reliable method for mass screening and evaluation of Brassica napus germplasm at the germination stage for breeding salt-tolerant rapeseed genotypes. mercial use.
evaluation , germination , rapeseed (Brassica napus L) , salinity stress , Salt tolerance
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State Key Laboratory of Crop Stress Biology for Arid Areas, College of Agronomy, Northwest A&F University, Yangling, China
Agrotechnological Faculty, North Kazakhstan State University, Petropavlovsk, Kazakhstan
Laboratory of Forest Microorganism, College of Forestry, Northwest A&F University, Yangling, China
State Key Laboratory of Crop Stress Biology for Arid Areas
Agrotechnological Faculty
Laboratory of Forest Microorganism
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